`37.b `

`38.a `

`39.b `

`40.b `

`41.a `

`42.b` 

`43.b`

`44.b `

`45.c`

`46.b `

`47.d `

`48.d `

`49.d `

`50.a `

`51.c`

`52.b `

`53.a `

`54.c `

hơi mờ nên đoán đại đáp án

37b is being repaired

38a wasn't invited

39b be taken care of

40b had been chosen

41a the police was attacked from behind

42 the meeting has to be held in this narrow room

43b the bridge was begun to be built two months ago

44b his photograph was shown on television

45c he was seen...the truck

46b he was made to do it

47d I have had my hair cut

48d a and b are correct

49d He is thought to have been born in a rich family.

50a it is impossible for this work to be done right now

51c the room is cleaned every day

52b all flights were cancelled because of fog

53a a new highway is being built around the city

54c a new hospital has been built near the airport